1 files changed, 39 insertions, 0 deletions
diff --git a/debian/libnss-systemd.postinst b/debian/libnss-systemd.postinst
new file mode 100644
index 0000000..16040bc
--- /dev/null
+++ b/debian/libnss-systemd.postinst
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -e
+
+# try to insert the systemd entry to the "passwd" and "group" lines in
+# /etc/nsswitch.conf to automatically enable libnss-systemd support; do not
+# change the configuration if the lines already contain "systemd"
+insert_nss_entry() {
+    echo "Checking NSS setup..."
+    # abort if /etc/nsswitch.conf does not exist
+    if ! [ -e /etc/nsswitch.conf ]; then
+        echo "Could not find /etc/nsswitch.conf."
+        return
+    fi
+    perl -i -pe '
+        sub insert {
+            my $line = shift;
+            # this also splits on tab
+            my @bits=split(" ", $line);
+            # do not break configuration if the line already references
+            # systemd
+            if (grep { $_ eq "systemd"} @bits) {
+                return $line;
+            }
+            # add systemd at the end
+            return $line . " systemd";
+        }
+        s/^(passwd:\s+)(.*)/$1.insert($2)/e;
+        s/^(group:\s+)(.*)/$1.insert($2)/e;
+    ' /etc/nsswitch.conf
+}
+
+if [ "$1" = configure ] && [ -z "$2" ]; then
+    echo "First installation detected..."
+    # first install: setup the recommended configuration
+    insert_nss_entry
+fi
+
+#DEBHELPER#